Improvement in lifting-jacks



L. DANZE are. H. ovce.

' Lifting-lacks.

Patented Sept. 22,1874.

, uw A N 7 YHE GRAPHIC COJMOYOLITHg-l 41 PARK PLACE, N.Y.

UNITED STATES PATENT OFFICE.

LOUIS DANZE AND EUGENE H. BOYOE, OF MONTREAL, CANADA, ASSIGNORS TO AUSTIN DEMMONS CABLE, OF SAME PLAGE.

IMPROVEMENT IN LlFTlNG-JACKS.

Specification forming part of Letters Patent N o. 155.147. dated September 22, 1874; application led May 22, 1874.

To all whom t may concern:

Be it known that we, LoUls DANZE, of the city of Montreal, in the district of Montreal, Province of Quebec, Canada, machinist, and EUGENE HARVEY BoYcE, of the same place, pattern-maker, have invented certain new and useful Improvements on Lifting- Jacks; and we do hereby declare that the following is a full, clear, and exact description of the same.

This invention has reference to improvements on jacks for lifting heavy bodies generally, and is more particularlyr adapted to the cla-ss used for raising the axle and carriage or other vehicle when it is desired to wash or grease the Wheels, &c., for the purpose of providing the same in a more compact and convenient form than those at present in use.

In the drawings hereunto annexed, similar letters of reference and numerals indicate like parts.

-Figure l is a front sectional elevation of the jack. Fig. 2 is a side elevation of the jack. Fig. 3 is a detail of the jack. Fig. 4 is a detail of the jack. Fig. 5 is a sectional view.

Letter a is a hollow cylinder, the lower extremity of which is extended to form a rectangular or other suitable foot or base for the cylinder to stand rmly on. In the bottom of this cylinder a slot, b, is formed, ex-

tending from the line l to 2 on one side of it,

and from 3 to 4 on the other. The hollow of the cylinder is cast parallel from top to bottom, to receive and guide in it a sleeve, o, of the construction shown in Figs. 3, 4, and 5, having a groove, d, extending from the top to the bottom of it, with the exception of the extreme end, which is solid, and formed with a projection or foot, e. In the groove d is tted a bar, f, filling the same, but made so that it will slide'freely in it. This barf and sleeve c are so constructed together that they make up the form of a solid cylinder, as shown in Fig. 5, of the proper size to fill up completely but at the same time slide freely. in, the hollow of the cylinder a. g are projections formed on c, having holes in them for receiving the pin h. In j' a number of holes are provided, so that the height of f in c may be adjusted to what is required within the range the jack is constructed for. z'is any suitable head for engaging with the axle, &c., to be lifted. k is a bent lever, of the form shown, attached in the slot b, and by a pivot, l, and provided with an extension, m, beyond the pivot, the part m being at right angles to 7c, and provided With a friction-roller at n, set in a recess formed in it for that purpose.

In putting the parts of the jack together, the sleeve c is first introduced with its upper end inserted into the cylinder a from below, and pushed up into place, the slot b being extended sufciently far in the foot at 2 to clear the projection or foot c. The lever k may next be placed in position and secured by pivot l. After this the bar f is slid into place and secured by pin h.

In using the jack, it is rst placed under the object (or axle) to be lifted, after which the height of i is adjusted by the holes in the bar f with pin h. The lever k is then depressed to the horizontal, or a little beyond it, bringing the end m to the vertical or a little beyond it, being then at the position indicated by dotted lines at 6 in Fig. l. The end m, in moving to this position, acting on the projection or foot e, and solid end of the sleeve c, raises it, the bar f, and head z', with its load.

By the formation of the lever, it will retain its position without any catch, &c., to hold the load supported. As the bent upper extremity of the leverV comes in contact with the ground in the above position, the lever is prevented from going too far down.

What we claim as our invention is The sleeve c, with bar f, adjustable in its groove d, and projections g for receiving pins h, combined with cylinder a and pivoted lever lc, having right-angled end m, adapted to operate on the sleeve-foot e, in the manner set forth.

Montreal, 9th day of May, A. D. 1874.

LOUIS DANZE. EUGENE H. BOYOE.

Witnesses C. G. O. SIMPSON, R. A. KELLOND. 

